You could use cornflake pads like the DS range, as that is what they can look like after hard use, ie they can fall to bits.
I'm very surprised you say you need to get the yellows warm, and can only assume you are a very gentle braker ?, in that case switch to redstuff.
Having used both reds/yellows, and the DS range I can guarantee you the DS range need way more heat to work, have a totally wooden feel, and aren't as good, just ask any plod who drives the response cars, where most are on ebc yellows, as the DS range failed the tests!!
Ask stu@msd about his DS pads, that fell to bits, but not the yellowstuff he switched to.
tabetha